<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像 -->
            <div class="avatar">
                <img src="../assets/img/user.png" alt="">
            </div>
            <!-- 登录表单 -->
            <el-form label-width="0px" :model="loginForm" :rules="loginFormRules" ref="loginFormRef" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"></el-input>
                </el-form-item>
                <!-- 按钮 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>

    </div>
</template>

<script>
export default {
  data () {
    return {
      // 登录表单数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 4, max: 12, message: '长度在 4 到 12 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置
    resetLoginForm () {
     this.$refs.loginFormRef.resetFields()
    },
    // 登录
    login(){
        this.$refs.loginFormRef.validate(async val=>{
            // 登录验证 true 则通过
            if(val){
                // 解构赋值，即res的值为返回数据中的data
                let {data:res}=await this.$http.post('login',this.loginForm)
                if(res.meta.status!=200) return this.$message.error(res.meta.msg)
                this.$message.success(res.meta.msg)
                // 将token保存在sessionStroage中，其它页面必须登录后才能访问，关闭该网站（浏览器）时token失效
                window.sessionStorage.setItem('token',res.data.token)
                this.$router.push('/home')
            }
            else{
                this.$message.warning('验证不通过！请填写好登录信息！')
            }
        })
    }
  }
}
</script>

<style lang="less" scoped>
    .login_container{
        height: 100%;
        background: #2b4b6b;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .login_box{
        width: 450px;
        height: 300px;
        background: #fff;
        border-radius: 3px;
        /*不使用flex布局
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%,-50%);
        */
        display: flex;
        flex-direction: column;
        align-items: center;
        .avatar{
            width: 130px;
            height: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #ddd;
            transform: translateY(-50%);
            background: #fff;
            img{
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background: #eee;
            }
        }
        .login_form{
            width: 100%;
            padding: 0 20px;
            box-sizing: border-box;
            transform: translateY(-38px);
            .btns{
                display: flex;
                justify-content: flex-end;
            }
        }
    }
</style>
